Crab apples are generally safe for dogs to eat in moderation, but require careful preparation. The flesh of the crab apple itself is non-toxic and can be a low-calorie treat. However, the seeds contain cyanogenic compounds that can release cyanide when digested, which is a serious concern. If your dog eats a few seeds accidentally, the risk is typically low due to the small quantity, but deliberate or repeated consumption of seeds should be avoided. Additionally, the high sugar content in crab apples means they should only be given occasionally and in small amounts, as excessive sugar can contribute to obesity, dental problems, and digestive upset. Before offering crab apples to your dog, remove all seeds and the core entirely. You should also cut the apple into appropriate bite-sized pieces to prevent choking. If your dog has underlying health conditions like diabetes, weight management issues, or a sensitive stomach, consult your veterinarian before introducing crab apples. Some dogs may also have individual sensitivities that cause gastrointestinal distress. Fresh, plain crab apple flesh in small quantities is unlikely to cause harm, but it's not a necessary part of a dog's diet—regular dog treats or other safer fruits like apples without seeds, blueberries, or watermelon are better choices.